JPS6115389B2

JPS6115389B2 -

Info

Publication number: JPS6115389B2
Application number: JP52034021A
Authority: JP
Inventors: Yasuo Yoshinaga
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 1977-03-29
Filing date: 1977-03-29
Publication date: 1986-04-23
Also published as: JPS53120458A

Description

【発明の詳細な説明】本発明は電池寿命表示装置に関する。従来、水晶時計その他の乾電池を使用する機器
において、電池が消耗した場合に、電池の寿命を
示す表示装置が提案されている。第６図に示す装
置はその一例を示すものである。図において１は
表示板で地極板２に回転自在に取りつけられ、地
極板には永久磁石３がとりつけられ、ヨーク４，
４′がＮ極、又はＳ極に励磁されて、表示板１の
上部においてヨーク４，４′が表示板を吸着し、
又ヨーク４にはコイル５が設けられ、電池の寿命
が一杯になるほぼ直前にコイル５に電流を流し、
磁石よりの励磁を打消すと、ヨーク４，４′の吸
引力が減少するので、吸引板６が回転するので、
表示板１は吸引板６より離れて回転する。上記の構造のものでは寿命表示板の全荷重が吸
引板に加わるので少しの振動あるいは衝撃により
誤動作し、又地極板と吸引板との吸引力を強くす
ると、コイルに流れる電流を大にする必要があり
寿命電圧の設定が高いものとなり寿命表示の効果
を失うという欠点があつた。本発明は上記の欠点
を改善し、電池寿命表示の振動あるいは衝撃等に
よる誤動作を防止した表示装置を提供するにあ
る。次に本発明の実施例を図面について説明する。第１図は本発明装置を時計に組込んだ状態を示
すもので、１１は時計モーブメント機構、１２は
内蔵された電池、１３は電池寿命表示装置で、第
２図はその分解斜視図を示す。第２図において１４は本体が逆Ｕ字形に形成さ
れた地極板で、該地極板には１対のヨーク１５，
１５′が形成され、ヨーク１５′には吸引板１６を
回転自在に支持するための支承部１７，１７′が
形成され、該支承部の上縁には切欠部が形成され
ている。吸引板１６は段部を有する本体１８と、
該本体１８の基部２０の両側より突出する支点１
９，１９′と、本体１８の基部２０の下部に係合
部２１とが形成されている。しかして該係合部は
支点１９，１９′のほぼ真下近傍に形成されてい
る。ヨーク１５にはコイル２２が挿入され、電磁
石が形成される。２３は表示板で、一端に地極板
１４の本体の下部に回転自在に取りつけられるた
めの支点２４が設けられると共に、表示板２３の
上辺には吸引板１６の係合部２１と係合するため
の係合片２５が設けられ、地極板１４の本体の下
部には、表示板２３を枢支するための孔２５が設
けられている。２６は永久磁石を示す。次に本発明装置の構成について説明すると、磁
石２６を地極板１４に固着し、表示板２３を地極
板１４に回転自在に取りつけると共に、吸引板１
６の支点１９，１９′をヨーク１５′と一体に形成
した支承部１７，１７′に係合し、吸引板１６の
本体１８をヨーク１５，１５′の下辺に近づける
と、吸引板１６はヨークに吸引される。このさい
吸引板１６の係合部２１は表示板２３の係合片２
５と係合する。この状態は第３図に示される。次に動作について説明すると、 (a) 常時は第３図に如く、永久磁石２６によりヨ
ーク１５，１５′は励磁され、吸引板１６は地
極板１４のヨーク１５に吸引されている。 (b) 電池１２の電圧が下がり、時計が遅れ始める
と時計１１の内部の検知回路（第４図参照）に
より時計の遅れを検知して、一瞬時コイル２２
に電流を流す。 (c) コイル２２に電流が流れると、地極板１４に
永久磁石２６の磁力を打消す磁界が発生して、
吸引板１６はヨーク１５から離れる。 (d) 吸引板１６の係合部２１で係合片２５を介し
て保持されていた表示板２３は、第１図の矢印
方向に落下して破線の位置へきて、電池の寿命
表示をする。 (e) 電池１２を交換して、表示板２３を矢印（第
１図）と反対方向に押し上げると、係合片２５
により本体１８が上方に押し上げられて、吸引
板１６は地極板１４に再び吸引され、表示板２
３は吸引板１６の係合部２１で保持される。第４図は電池に寿命がきて、電池電圧が下る
と、コイル２２に電流を流す回路の一例を示す。
Ｅは電池、ZDはツエナーダイオード、R₁，R₂は
抵抗、Tr₁，Tr₂はトランジスタ、２２はコイル
を示す。第５図は本発明の他の実施例を示すもので、吸
引板１６は断面がほぼコ字形に形成し、両端面に
支点１９，１９′を設け、吸引板１６の上辺がヨ
ーク１５，１５′の下辺に吸引されるように、ヨ
ーク１５，１５′と直角に配置し、かつ吸引板１
６の係合部２１を、吸引板１６の支点１９，１
９′を結ぶ直線のほぼ真下近傍に設けて、表示板
２３の係合片２５と係合せしめるようにした。本発明は叙上のように、表示板２３の係合片は
吸引板１６の支点１９，１９を結ぶ直線のほぼ真
下近傍に係合部２１を設けて、表示板２３を保持
する構造としたので、表示板２３の荷重がほぼ吸
引板の支点に加わり、吸引板１６と地極板１４間
の吸引力を大にすることなく、振動、衝撃等によ
る電池寿命表示の誤動作を防止しうるという効果
を有する。 DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery life display device. 2. Description of the Related Art Conventionally, in crystal watches and other devices that use dry batteries, display devices have been proposed that indicate the battery life when the batteries are exhausted. The device shown in FIG. 6 is an example of this. In the figure, 1 is a display plate rotatably attached to a ground plate 2, a permanent magnet 3 is attached to the ground plate, a yoke 4,
4' is excited to the north pole or the south pole, and the yokes 4, 4' attract the display board at the upper part of the display board 1,
Further, the yoke 4 is provided with a coil 5, and a current is applied to the coil 5 almost immediately before the end of the battery life.
When the excitation from the magnet is canceled, the attraction force of the yokes 4, 4' decreases, and the attraction plate 6 rotates.
The display plate 1 rotates away from the suction plate 6. With the above structure, the entire load of the life display plate is applied to the suction plate, so even the slightest vibration or shock can cause malfunctions, and if the suction force between the ground plate and the suction plate is strengthened, the current flowing through the coil will increase. As a result, the lifespan voltage has to be set high, which has the disadvantage of losing the effectiveness of the lifespan display. SUMMARY OF THE INVENTION The present invention aims to improve the above-mentioned drawbacks and to provide a display device that prevents malfunctions of the battery life display due to vibrations, shocks, etc. Next, embodiments of the present invention will be described with reference to the drawings. Fig. 1 shows the device of the present invention incorporated into a timepiece; 11 is a watch movement mechanism, 12 is a built-in battery, 13 is a battery life display device, and Fig. 2 is an exploded perspective view thereof. . In FIG. 2, reference numeral 14 denotes a ground plate whose main body is formed in an inverted U shape, and the ground plate has a pair of yokes 15,
The yoke 15' is formed with support parts 17, 17' for rotatably supporting the suction plate 16 , and a notch is formed in the upper edge of the support part. The suction plate 16 includes a main body 18 having a stepped portion;
A fulcrum 1 protruding from both sides of the base 20 of the main body 18
9 and 19', and an engaging portion 21 is formed at the lower part of the base 20 of the main body 18. The engaging portions are formed almost directly below the fulcrums 19, 19'. A coil 22 is inserted into the yoke 15 to form an electromagnet. Reference numeral 23 denotes a display plate, which is provided with a fulcrum 24 at one end for being rotatably attached to the lower part of the main body of the earth electrode plate 14, and is engaged with the engaging portion 21 of the suction plate 16 on the upper side of the display plate 23. An engagement piece 25 for supporting the display board 23 is provided at the bottom of the main body of the ground plate 14, and a hole 25 for pivotally supporting the display board 23 is provided. 26 indicates a permanent magnet. Next, the configuration of the device of the present invention will be described. The magnet 26 is fixed to the ground plate 14, the display plate 23 is rotatably attached to the ground plate 14, and the suction plate 1
When the fulcrums 19, 19' of 6 are engaged with the support parts 17, 17' formed integrally with the yoke 15', and the main body 18 of the suction plate 16 is brought close to the lower side of the yokes 15, 15', the suction plate 16 is attached to the yoke. is attracted to. At this time, the engaging portion 21 of the suction plate 16 is connected to the engaging piece 2 of the display plate 23.
5. This situation is shown in FIG. Next, the operation will be explained: (a) As shown in FIG. 3, the yokes 15 and 15' are normally excited by the permanent magnet 26, and the attraction plate 16 is attracted to the yoke 15 of the earth plate 14. (b) When the voltage of the battery 12 decreases and the clock starts to lag, the detection circuit inside the clock 11 (see Figure 4) detects the lag, and the momentary coil 22
A current is passed through. (c) When current flows through the coil 22, a magnetic field is generated in the earth plate 14 that cancels the magnetic force of the permanent magnet 26,
The suction plate 16 is separated from the yoke 15. (d) The display plate 23, which was held by the engagement part 21 of the suction plate 16 via the engagement piece 25, falls in the direction of the arrow in FIG. 1 and comes to the position indicated by the broken line, indicating the battery life. . (e) When the battery 12 is replaced and the display plate 23 is pushed up in the opposite direction to the arrow (Fig. 1), the engaging piece 25
, the main body 18 is pushed upward, the suction plate 16 is again attracted to the ground plate 14, and the display plate 2
3 is held by the engaging portion 21 of the suction plate 16 . FIG. 4 shows an example of a circuit that allows current to flow through the coil 22 when the battery reaches the end of its life and the battery voltage drops.
E is a battery, ZD is a Zener diode, R ₁ and R ₂ are resistors, Tr ₁ and Tr ₂ are transistors, and 22 is a coil. FIG. 5 shows another embodiment of the present invention, in which the suction plate 16 is formed into a substantially U-shaped cross section, with fulcrums 19, 19' provided on both end surfaces, and the upper side of the suction plate 16 is connected to the yokes 15, 15. The suction plate 1 is arranged perpendicularly to the yokes 15, 15' so that it is attracted to the lower side of the suction plate 1.
The engaging portion 21 of 6 is connected to the fulcrum 19, 1 of the suction plate 16 .
9' is provided almost directly below the straight line connecting the lines 9' and engaged with the engagement piece 25 of the display board 23. As described above, the present invention has a structure in which the engaging piece of the display board 23 holds the display board 23 by providing the engaging portion 21 almost directly below the straight line connecting the fulcrums 19 and 19 of the suction board 16 . Therefore, the load of the display plate 23 is almost applied to the fulcrum of the suction plate, and malfunction of the battery life display due to vibration, impact, etc. can be prevented without increasing the suction force between the suction plate 16 and the ground electrode plate 14. have an effect.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明を時計に組込んだ状態図、第２
図は本発明装置の分解斜視図、第３図は表示板と
吸引板との係合詳細図、第４図はコイルの励磁回
路、第５図は本発明の他の実施例、第６図は従来
例を示す。１１……時計モーブメント機構、１２……電
池、１３……電池寿命表示装置、１４……地極
板、１５，１５′……ヨーク、１６……吸引板、
１７……支承部、１８……本体、１９……支点、
２０……基部、２１……係合部、２２……コイ
ル、２３……表示板、２４……支点、２５……係
合片。 Fig. 1 is a state diagram in which the present invention is incorporated into a watch;
The figure is an exploded perspective view of the device of the present invention, Figure 3 is a detailed view of the engagement between the display plate and the suction plate, Figure 4 is the coil excitation circuit, Figure 5 is another embodiment of the present invention, and Figure 6 is shows a conventional example. 11...Clock movement mechanism, 12...Battery, 13 ...Battery life display device, 14...Ground plate, 15, 15'...Yoke, 16 ...Suction plate,
17...Bearing part, 18...Body, 19...Fully point,
20...base, 21...engaging portion, 22...coil, 23...display plate, 24...fulcrum, 25...engaging piece.

Claims

【特許請求の範囲】[Claims]

１本体の両側に１対のヨークを有する、断面が
ほぼ逆Ｕ字形の地極板と、前記の地極板において
前記のヨークの基部に取付けられた永久磁石と、
前記の永久磁石により前記のヨークに流れる磁束
を打消すように磁束を発生する電磁石と、電池電
圧の低下を検出して、前記の電磁石に電流を流す
検知回路と、両端部において前記のヨークに回動
自在に支承され、本体が前記のヨークに吸引可能
に形成されている吸引板と、前記の吸引板の本体
の下部に設けられたカギ状の係合部と、前記の係
合部に係合可能な係合片を、頂部に備え、かつ前
記の地極板に回動自在に支承されている表示板と
を具備することを特徴とする電池寿命表示装置。1. A ground plate having a pair of yokes on both sides of the main body and having a substantially inverted U-shaped cross section, and a permanent magnet attached to the base of the yoke in the ground plate;
an electromagnet that generates a magnetic flux so as to cancel the magnetic flux flowing through the yoke by the permanent magnet; a detection circuit that detects a drop in battery voltage and causes current to flow through the electromagnet; a suction plate that is rotatably supported and whose main body is formed to be able to be sucked into the yoke; a hook-shaped engaging portion provided at the bottom of the main body of the suction plate; A battery life display device comprising: a display plate having an engageable engagement piece on the top thereof and rotatably supported on the ground plate.